Definition of "knowne"

[…] So now in heaven a signe it doth appeare, The Harpe well knowne beside the Northern Beare.

1591, Edmund Spenser, “The Teares of the Muses”, in The Poetical Works of Edmund Spenser, Volume 5‎

But yt he should not but have had either shipping ready before this time, or at least certaine means, and course, and ye same knowne to us for it, or have taken other order otherwise, cannot in my conscience be excused.

1621, Azel Ames, The Mayflower and Her Log, Complete‎

Being not knowne, some great persons in the pew I pretended to, and went in, did question my coming in.

1664 April 4 (date written; Gregorian calendar), Samuel Pepys, Mynors Bright, transcriber, “March 25th, 1664 (Lady day)”, in Henry B[enjamin] Wheatley, editor, The Diary of Samuel Pepys […], volume IV, London: George Bell & Sons […]; Cambridge: Deighton Bell & Co., published 1894, page 85